Hi list,
I've got the mentioned MP3 player with 4GB built-in flash memory and an
SD/SDHC card slot. The player worked under Linux with the shipped
firmware, but in order to make its card slot SDHC compatible I installed
their current firmware v2.50. The USB mass storage driver of that
firmware still seems to work on Windows (shows built-in flash and card
slot as two separate drive letters), became a bit quirkier on OS X (is
shown as invalid volume upon connection, is then quickly recognized as
it should and can be accessed, immediately reinserts itself when it was
"ejected"), but hardly works under Linux.
With card slot empty:
usb 1-8: new high speed USB device using ehci_hcd and address 23
usb 1-8: configuration #1 chosen from 1 choice
scsi71 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 23
usb-storage: waiting for device to settle before scanning
scsi 71:0:0:0: Direct-Access COWON D2 0100 PQ: 0
ANSI: 0
sd 71:0:0:0: [sdd] Sector size 0 reported, assuming 512.
sd 71:0:0:0: [sdd] 1 512-byte hardware sectors (0 MB)
sd 71:0:0:0: [sdd] Write Protect is off
sd 71:0:0:0: [sdd] Mode Sense: 37 00 00 08
sd 71:0:0:0: [sdd] Assuming drive cache: write through
sd 71:0:0:0: [sdd] Sector size 0 reported, assuming 512.
sd 71:0:0:0: [sdd] 1 512-byte hardware sectors (0 MB)
sd 71:0:0:0: [sdd] Write Protect is off
sd 71:0:0:0: [sdd] Mode Sense: 37 00 00 08
sd 71:0:0:0: [sdd] Assuming drive cache: write through
sdd: unknown partition table
sd 71:0:0:0: [sdd] Attached SCSI removable disk
sd 71:0:0:0: Attached scsi generic sg4 type 0
usb-storage: device scan complete
Can't do much with that.
With an 8GB SDHC card inserted:
usb 1-8: new high speed USB device using ehci_hcd and address 24
usb 1-8: configuration #1 chosen from 1 choice
scsi72 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 24
usb-storage: waiting for device to settle before scanning
scsi 72:0:0:0: Direct-Access COWON D2 0100 PQ: 0
ANSI: 0
sd 72:0:0:0: [sdd] 15728160 512-byte hardware sectors (8053 MB)
sd 72:0:0:0: [sdd] Write Protect is off
sd 72:0:0:0: [sdd] Mode Sense: 37 00 00 08
sd 72:0:0:0: [sdd] Assuming drive cache: write through
sd 72:0:0:0: [sdd] 15728160 512-byte hardware sectors (8053 MB)
sd 72:0:0:0: [sdd] Write Protect is off
sd 72:0:0:0: [sdd] Mode Sense: 37 00 00 08
sd 72:0:0:0: [sdd] Assuming drive cache: write through
sdd: sdd1
sdd: p1 exceeds device capacity
sd 72:0:0:0: [sdd] Attached SCSI removable disk
sd 72:0:0:0: Attached scsi generic sg4 type 0
usb-storage: device scan complete
attempt to access beyond end of device
sdd: rw=0, want=15758216, limit=15728160
Buffer I/O error on device sdd1, logical block 1968752
[repeated]
attempt to access beyond end of device
sdd: rw=0, want=15758280, limit=15728160
[repeated]
Then I can at least access the SDHC card.
$ ls /sys/bus/usb/devices/1-8*/
/sys/bus/usb/devices/1-8/:
1-8:1.0 bNumConfigurations dev maxchild uevent
bConfigurationValue bNumInterfaces devnum power
usb_endpoint
bDeviceClass bcdDevice driver product version
bDeviceProtocol bmAttributes ep_00 quirks
bDeviceSubClass busnum idProduct serial
bMaxPacketSize0 configuration idVendor speed
bMaxPower descriptors manufacturer subsystem
/sys/bus/usb/devices/1-8:1.0/:
bAlternateSetting bInterfaceProtocol driver ep_83 power
usb_endpoint
bInterfaceClass bInterfaceSubClass ep_02 host72 subsystem
bInterfaceNumber bNumEndpoints ep_81 modalias uevent
The initial successful tests with the old firmware and what you see
above is with Linux 2.6.23-rc6.
Questions:
- Are there usb-storage or scsi-mod workarounds which are good
candidates to make it work?
- Is there a way to specify quirks to usb-storage at runtime?
Thanks,
--
Stefan Richter
-=====-=-=== =--= ===-=
http://arcgraph.de/sr/
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